User-suggested changes from the last version: "Move Lock" feature (Press space and you don't change firing direction when you shoot), load button on the start screen
If you have any small or minor suggestions that you want me to consider, this is your last chance to do so. Nothing too big, though (Like a boss or something), because I'm almost done.
As for health, you can farm for points in the spooky forest (Or in the next version, the Big City) and buy hot pockets (There is no health cap)
how
save? there are save/load buttons in the top left screen
to farm for points, there are censor block monsters in spooky forest that respawn every time you kill them
as for invincibility, there's an item you can buy that makes collision-with-enemy kills impossible
Yep; of course, there's probably no point in bothering with your current version, as your saves probably won't be compatible with the final version (Due to the World Map being a persistent room and the new rooms probably won't appear on the WM); so just wait until the final version is released